Cushion-tire.



C. HIRD.

CUSHION TIRE. (Applica tion filed Howl, 1901.)

Patnted Mar. n, 1902.

- 2 Sheets-Sheet I.

( No Model.)

.6. 'H I RD.

busmon TIRE.

(Application filed Nov. 1. 1901.) '(No Model.) 2 Sheats$heet 2.

Patented Ma}. n, |902.f

I hp/E5555. Z- /a A; 1 1% M UNITED STATES PATENT OFFICE.

CHARLES HIRD, or wooNsooKEr, RnoD IS'JLIAND, AssIenoR or. FOR'IY- NINE ONE-HUNDREDTIIS To PATRICK J. MQOAR'IHY, or raovinnnon,

RI-IODE ISLAND.

CUSHION-TIRE."

SPECIFICATION forming .part of Letters Patent No. 95,394, dated. at 11, -1 902. I

. Application filed November 1:, 1901- SerialflTo 80,806 (No rhedeld u I To all whom it may concern:

Be it known that I, CHARLES HIRD, a sub ject of the King of GreatBritaimresidingat in thefdifferen't viewsof the drawings.

the city of Woonsocket, in the county of Providence and State of Rhode Islan d,..have

referringto the cross-section of the same in' I invented certain new and useful Improvements in Cushion-Tires, of which thefollowing is a specification.

My invention relates to the novel construe-j ac tion of a core and its casing to constitute a vehicle-tire. 1

The invention consists in a core composed; of two grades of rubber which are cast in one, continuous piece to form .the' circle of the tire, said core provided with concave sides" the said rubberparts unite'and form a continuous tire inthe manner as hereinafter described and claimed." a

In the accompanyiug'tiwofsheets of drawings, Figure 1 representsja side elevation of .30 my improved cellular corefl Fig. 2 isan enlarged cross-sectional View taken inline :1: a: I of the same.v Fig."3 -is a partial topplan sectional view of thecore,=taken}=inline 3 y of Fig. 1; Fig.& is a cross-sectional view of the v core and stripswhic h forrn the casing,con-

sisting of rubber, fabric, and rubber, respec-' tively, and also, indicating the dotted position of the casingupon thecore as prior to vulcanizing the rubberparts. Fig.j5 is a crosssectional View of the tire complete. Fig. 6

is a partial side elevation ofthe'core, having braid woven upon its exterior surface. Fig. 7 is a cross-sectional view taken in line z z of the same. Fig. 8 is a cross-sectional view of the braided core and casing complete and showing the aforesaid strips in dotted position as prior to encircling'the core. Fig. 9 is a crosssectional viewof the cellular core view of the same with itscasing complete.

in a modified form, and Fig. 10 isa similar Likeletters of reference indicate like parts A represents a continuous rubber core, and,

Fig. 2,}this core is castfiua'suitable flask, 5'5

I .(not'shown,) so as to expose inner'and outer, jconvex surfaces, as aand b, respectwely, the 1 circle of each being of equal radius from the terminate with concave sides o 0'. I

, d dareflribs'which are divided equidistant center of the. core, and these convex surfaces "apart around the concave sidesnofihe core I opposite of each other, as shown in Fig. 3, and L extending in a plane radially to the axialcenter of the core,'as shown in Fig. 1.1 The outer surface I) of the core is 'made somewhat narrower than the inner surface a, so as to provide a narrow tread for the tire, and the outer faces of the ribs (1 d-incline iu aplanete'rminating with the edges ofthe concavo-convex 7o surfaces of the core, as shown in Fig.2; 'TWo I di'fierent qualities of rubber are used in; the

molding of this'core, 'a harder grade of'rubher being usedlforjthe=inner and outer por-q tions of the core, wit 1 1 a softer or finer grade '75" of rubber interposed between the first-afore-' said grade, as indicated by the darker sec- I tion-liues in Fig.2, soas toform a more yielding eifect in'thecenter of the core. This core. is placed upon-a series of strips, each made of rubber, fabric, and rubber, respectively,

and of a size that when folded over the 001e,, I

as indicated by dotted lines in Fig. 4:, theside 5 edges of the said strips meet together in the '1 I longitudinal center of theinnersurface of the core, as at'a point h, and the parts thus as-ij sembled are mounted in a suitable-flask, I

which is placed in a heated press (not shown) to receive the proper degree of heat,whereby the rubber portions unite continuous ofeach e; ;.j; other throughout the circle of the tire in the; manuerasillustratedin cross-sectioninFigfil j f I do not wish to limit myself to the exact construction of the casing for the core described, for instead of adhering the strip ejto 1 a 1 the core in the vulcanization of the rubber 1 the said core may be covered by braid i, as shown in Fig. 6, woven by suitable means upon the exterior surface of the core, after which the strips are used to complete the casing in the manner as hercinbefore described.

In Fig. 9 I show a slight modification of the core, whereby the same may be cast so as to expose a circular form in cross-section and which core is designed more particularly to sustain heavy loads, said core having the same construction of easing as above mentioned and receiving the proper degree of heat for vulcanizing the rubber parts integral with each other throughout the circle of the tire in the manner as shown in cross-section in Fig. 10.

By having the core provided with a plurality of cells in its longitudinal sides not only lessens the weight of the tire, but also affords a resiliency which would not be possessed by a solid core, and at the same time the ribs which divide the cells apart act as trusses to strengthen the central portion of the core.

From this descri ption it will be readily seen that by my construction I form a cushiontire that is strong, durable, and compara- Lively inexpensive to manufacture.

Having described my invention, what I claim is- 1. In a vehicle-tire, a core composed of two grades of rubber, one grade of which is of harder quality to form the inner and outer portions of the core, and the other grade being interposed between the first-said grade of rubber and of finer qualityto more readily yield, said core cast in one piece to form the circle of the tire, and exposing inner and outer convex surfaces and provided with concave sides which are divided equidistant apart by ribs that extend radially to the axial center of the core, in combination therewith, of a casing consisting of three separate strips, each of rubber, fabric, and rubber, respectively, and ot' a length and width to encircle the said top and bottom surfaces and provided with concave sides that are divided apart by vertical ribs situated opposite of each other and having their front faces inwardly inclined from the top surface of the core, said core braided upon its exterior surface by suitable means, the combination therewith,of a casing consisting of a series of strips, each made of rubber, fabric, and rubber, respectively, and each of said strips of a size to encircle the said core, all of said parts adapted to be mounted in a suitable flask and given the proper degree of heat to vulcanize and make the said rubberstri ps integral with each other throughout the circle of the tire, substandaily as set forth.

3. In a vehicle-tire, a circular core cast in one continuous piece and composed of two grades of rubber the softer grade of which. being located centrally of the core, said core provided with concave sides having ribs divided equidistant apart around the circle of the core, in combination therewith, of a casing consisting of three strips, each of rubber, fabric, and rubber, respectively, and all of a length and width to fold over the said core, so arranged that when placed in a suitable flask and given the proper degree of heat the vulcanization makes the said rubber parts continuous of each other throughout the circle of the tire, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

' CHARLES IIIRD.

Witnesses:

LIVINGSTON HAM, ERNEST O. CHURCH. 

